Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Net sales	$ 560,633	$ 545,138	$ 1,687,231	$ 1,672,568
Income before income taxes	(335,216)	350,131	1,561,651	1,553,906
Life Science [Member]
Segment Reporting Information [Line Items]
Net sales	215,700	206,600	643,900	622,200
Income before income taxes	11,600	10,200	45,900	25,700
Clinical Diagnostics [Member]
Segment Reporting Information [Line Items]
Net sales	341,800	334,000	1,032,900	1,038,800
Income before income taxes	43,800	22,400	117,100	86,800
Other Segments [Member]
Segment Reporting Information [Line Items]
Net sales	3,100	4,500	10,400	11,600
Income before income taxes	$ (400)	$ 100	$ (1,100)	$ 100